CPT Code(s)

Methodology

Immunoassay

Reference Range(s)

Male

18-59 Years

1.5-9.3

mIU/mL

≥60 Years

1.6-15.2

mIU/mL

Female

Follicular Phase

1.9-12.5

mIU/mL

Mid-Cycle Peak

8.7-76.3

mIU/mL

Luteal Phase

0.5-16.9

mIU/mL

Postmenopausal

10.0-54.7

mIU/mL

Children (<18 years old): LH reference ranges established on post-pubertal patient population. Reference range not established for pre-pubertal patients using this assay. For pre-pubertal patients, the Quest Diagnostics LH, Pediatrics assay is recommended (test code 36086).

Clinical Significance

This test is useful in the differential diagnosis of pituitary and gonadal insufficiency and in children with precocious puberty.